package com.leesk.trial.springbootautoconfiguration;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.event.ApplicationEventMulticaster;
import org.springframework.context.event.SimpleApplicationEventMulticaster;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;

/**
 * @Author: leesk
 * @Description:
 * @Date: Create in 10:18 2020/10/24
 */
@EnableConfigurationProperties(CustomProperties.class)
public class Lab2AutoConfig {
    @Bean
    @ConditionalOnProperty(prefix = "leesk.auto",name = "enable")
    CommandLineRunner createCustomCommandLineRunner(){
        return new SpringBootAutoconfigurationApplication.CustomCommandLineRunner();
    }

    /**
     * @Description：自定义的事件发布器
     * *
     * Spring框架有一个事件发布者的默认实现类{@link SimpleApplicationEventMulticaster}，我们可以根据它来自定义自己的事件发布器
     * 下面自定义一个SimpleApplicationEventMulticaster，并设置线程池，以实现使用线程池异步发布事件
     * *
     * @param taskExecutor
     * @return
     */
    @Bean(AbstractApplicationContext.APPLICATION_EVENT_MULTICASTER_BEAN_NAME)
    ApplicationEventMulticaster customApplicationEventMulticaster(ThreadPoolTaskExecutor taskExecutor){
        SimpleApplicationEventMulticaster eventMulticaster = new SimpleApplicationEventMulticaster();
        eventMulticaster.setTaskExecutor(taskExecutor);
        return eventMulticaster;
    }

    /**
     * 自定义事件类
     */
    static class NoticeEvent extends ApplicationEvent {
        private static final Logger logger = LoggerFactory.getLogger(NoticeEvent.class);

        /**
         * 存储信息
         */
        private final String message;

        /**
         * Create a new {@code ApplicationEvent}.
         */
        public NoticeEvent(String message) {
            super(message);
            this.message = message;
            logger.info("添加事件成功！message:{}",message);
        }

        public String getMessage() {
            return message;
        }
    }

    /**
     * 自定义事件监听器，监听{@link NoticeEvent}事件
     */
    @Component
    static class NoticeListener implements ApplicationListener<NoticeEvent> {
        private static final Logger logger = LoggerFactory.getLogger(NoticeListener.class);

        @Override
        public void onApplicationEvent(NoticeEvent event) {
            logger.info("事件监听器获取到 NoticeEvent，睡眠当前线程2秒...");
            try {
                Thread.sleep(2000);
            }catch (InterruptedException e){
                e.printStackTrace();
            }
            logger.info("NoticeEvent 的 message 属性是：{}", event.getMessage());
        }
    }

    /**
     * 自定义 ApplicationReadyEvent 事件监听器
     * @return
     */
    @Bean
    public ApplicationListener<ApplicationReadyEvent> listener(){
        return new ApplicationListener<ApplicationReadyEvent>() {
            @Override
            public void onApplicationEvent(ApplicationReadyEvent event) {
                System.out.println("自定义 ApplicationReadyEvent 事件监听器！");
            }
        };
    }
}
